My coffee hasn't kicked in yet, so this is as diplomatic as I can phrase it under current conditions:

Both are entrenched identity politics instances ("aNaRchISM!") and a good chunk of the calls for violence around here are from users there. You'll be over here trying to have a rational discussion, and someone from there comes in like the world's dumbest parrot who can only say "Bawk! Guillotines! Bawk! Luigi".

dbzer0 was aight when it was just the piracy instance, but they've shifted more to far left politics and re-federated with Hexbear, so they're basically Hexbear-lite these days. Quokk turns a complete blind eye (or tacitly endorses) several power users who do nothing but call for violence, doxx, and/or do nothing but spread anarchist propaganda.

they are full of hostile angry people living in alternative version of reality

Well fucking said!👏

We really need to grow beyond the idea that blocking is "censorship". That only (arguably) applies to large centralized platforms. The fediverse allows all voices to speak but it doesn't force everyone else to listen.

The fediverse gives us huge individual and collective power and we can use it to grow beyond the constraints of the old platforms.